[VanV]

I think it's a bit of a stretch to include coinlab, they don't seem to ever have actually launched a US exchange.

Also, Kraken looks to be US based but don't yet allow US customers to trade USD pairs, only crypto/crypto so far.

Would also really like to see exchanges offer proper websocket/streaming API access, so far the only two who have shut down (Bitfloor, MtGox). Trying to write a proper trading algo against unreliable "REST" APIs is generally an exercise in frustration.

[contingencies]

We literally just suspended USD pairs last week as we are upgrading our connectivity to a much larger bank that can offer us the quality of USD settlement our users deserve. We'll be live again with USD very soon. In the mean time, we still have other conventional currencies... notably EUR.

[gojomo]

Who is 'we'? (The parent comment equally mentions CoinLab, Kraken, MtGox, and Bitfloor. As the topmost topic, Buttercoin is a possible antecedent as well.)

[ck2]

I believe they are kraken (payward)